Abstract
In recent years, with the technological advance and the downsizing of the electronic device, the calorific value per unit area continues rising. Therefore, we had applied high-carbon alcohol aqueous solution, pure water and low-carbon alcohol aqueous solution to boiling with impinging flow in mini channel and compared the result with each other. With three thermocouples which were inserted near the heat transfer surface, we calculated the heat flux and the temperature of the heat transfer surface by the temperature gradient obtained from them. The high-carbon alcohol aqueous solution realized higher dryout heat flux than others. In addition, the maximum value of CHF was shown to exist depending on the concentration of the solutions. We investigated the flow velocity on the bubble and liquid interface with the numerical model which analyzed the Marangoni convection mechanism. In this model, butanol aqueous solution also realized that the maximum value of the flow velocity existed for some concentration of the solutions. This suggested the relationship about the mechanism indicating maximum of CHF between the experiment and the numerical model.
